A man must practice good works for a long time, with great effort and determination, and "at last God comes, dwells within him and he in the Lord, and the Lord Himself sows His own commandments within him, filling him with spiritual fruit." - St. Marcarius the Great - Homily 19
It's not how much you do, it's how often you do it. It simply doesn't matter if you make some monumental effort at any given time. You have it in your to give that extra little bit. You know that you could add that finishing touch. You know you can take that extra step.
A lobster, when left high and dry among the rock, does not have the sense enough to work his way back to the sea, but waits for the sea to come to him. If it does not come, he remains where he is and dies, although the slightest effort would enable him to reach the waves, which are perhaps within a yard of him. The world is full of human lobsters; people stranded on the rocks of indecision and procrastination, who, instead of putting forth their own energies, are waiting for some grand billow of good fortune to set them afloat.
People turn over their lives to spiritual work to try to escape, and want all their problems to go away, be solved; but spiritual life is hard and takes all your effort. Keep your intelligence about you.
Source: Modern-Day Meditation Guide Book by Jim St. James
The right art is purposeless, aimless! The more obstinately you try to learn how to shoot the arrow for the sake of hitting the goal, the less you will succeed in the one and the further the other will recede.
D.T. Suzuki (1870 - 1966)
Source: Zen in the Art of Archery (Vintage Spiritual Classics)