The path of the Christian is indeed a mysterious one, full of harmonious contradictions and heavenly paradoxes. He is never easy when at ease, nor without a burden when he has none. He is never satisfied without doing something, and yet is never satisfied with anything that he does. He is never so strong as when he sits still [Isaiah 30:7], never so fruitful as when he does nothing, and never so active as when he makes the least haste [Isaiah 28:16]. All outstrip him in the race, yet he alone gains the goal, and wins the prize. All are sure of heaven but himself, yet he enters into the kingdom, whilst they are thrust out. He wins pardon through guilt, hope through despair, deliverance through temptation, comfort through affliction, and a robe of righteousness through filthy rags. Though a worm and no man, he overcomes Omnipotence itself through violence; and though less than vanity and nothing [Isaiah 40:17 2 Corinthians 12:11], he takes heaven itself by force [Matthew 11:12.]
Thus amidst the strange contradictions which meet in a believing heart, he is never so prayerful as when he says nothing; never so wise as when he is the greatest fool; never so much alone as when most in company; and never so much under the power of an inward religion as when most separated from an outward one. Strange mysterious creature! He cannot live without sinning, yet cannot live in sin; cannot live without prayer, and yet for days together cannot pray; continually finds religion a burden, yet would not part with it for the world; lusts after sin as a delicious morsel, yet hates it with a perfect hatred; esteems Christ the Chiefest among ten thousand, and yet is at times tried with doubts whether He is a Saviour at all.
– J.C. Philpot