"Strait is the gate, and narrow is the way, which leadeth unto life." Matthew 7:14.
In the time of Christ the people of Palestine lived in walled towns, which were mostly situated upon hills or mountains. The gates, which were closed at sunset, were approached by steep, rocky roads, and the traveler journeying homeward at the close of the day often had to press his way in eager haste up the difficult ascent in order to reach the gate before nightfall. The loiterer was left without.
The narrow, upward road leading to home and rest furnished Jesus with an impressive figure of the Christian way. The path which I have set before you, He said, is narrow; the gate is difficult of entrance; for the golden rule excludes all pride and self-seeking. There is, indeed, a wider road; but its end is destruction. If you would climb the path of spiritual life, you must constantly ascend; for it is an upward way. You must go with the few; for the multitude will choose the downward path.
In the road to death the whole race may go, with all their worldliness, all their selfishness, all their pride, dishonesty, and moral debasement. There is room for every man's opinions and doctrines, space to follow his inclinations, to do whatever his self-love may dictate. In order to go in the path that leads to destruction, there is no need of searching for the way; for the gate is wide, and the way is broad, and the feet naturally turn into the path that ends in death.
But the way to life is narrow and the entrance  strait. If you cling to any besetting sin you will find the way too narrow for you to enter. Your own ways, your own will, your evil habits and practices, must be given up if you would keep the way of the Lord. He who would serve Christ cannot follow the world's opinions or meet the world's standard. Heaven's path is too narrow for rank and riches to ride in state, too narrow for the play of self-centered ambition, too steep and rugged for lovers of ease to climb. Toil, patience, self-sacrifice, reproach, poverty, the contradiction of sinners against Himself, was the portion of Christ, and it must be our portion, if we ever enter the Paradise of God.
Yet do not therefore conclude that the upward path is the hard and the downward road the easy way. All along the road that leads to death there are pains and penalties, there are sorrows and disappointments, there are warnings not to go on. God's love has made it hard for the heedless and headstrong to destroy themselves. It is true that Satan's path is made to appear attractive, but it is all a deception; in the way of evil there are bitter remorse and cankering care. We may think it pleasant to follow pride and worldly ambition, but the end is pain and sorrow. Selfish plans may present flattering promises and hold out the hope of enjoyment, but we shall find that our happiness is poisoned and our life embittered by hopes that center in self. In the downward road the gateway may be bright with flowers, but thorns are in the path. The light of hope which shines from its entrance fades into the darkness of despair, and the soul who follows that path descends into the shadows of unending night.
 "The way of transgressors is hard," but wisdom's "ways are ways of pleasantness and all her paths are peace." Proverbs 13:15; 3:17. Every act of obedience to Christ, every act of self-denial for His sake, every trial well endured, every victory gained over temptation, is a step in the march to the glory of final victory. If we take Christ for our guide, He will lead us safely. The veriest sinner need not miss his way. Not one trembling seeker need fail of walking in pure and holy light. Though the path is so narrow, so holy that sin cannot be tolerated therein, yet access has been secured for all, and not one doubting, trembling soul need say, "God cares nought for me."
The road may be rough and the ascent steep; there may be pitfalls upon the right hand and upon the left; we may have to endure toil in our journey; when weary, when longing for rest, we may have to toil on; when faint, we may have to fight; when discouraged, we must still hope; but with Christ as our guide we shall not fail of reaching the desired haven at last. Christ Himself has trodden the rough way before us and has smoothed the path for our feet.
And all the way up the steep road leading to eternal life are well-springs of joy to refresh the weary. Those who walk in wisdom's ways are, even in tribulation, exceeding joyful; for He whom their soul loveth, walks, invisible, beside them. At each upward step they discern more distinctly the touch of His hand; at every step brighter gleamings of glory from the Unseen fall upon their path; and their songs of praise, reaching ever a higher note, ascend to join the songs of angels before the throne. "The path of the righteous  is as the light of dawn, that shineth more and more unto the perfect day." Proverbs 4:18, R.V., margin.
From Mount of Blessing Pages 138-141