Jared Wilson, whose blog now appears in The Gospel Coalition neighborhood provides a triple dose of quotes plus one more that encourages those who view their faith as too weak to please God.
“I find not salvation put upon the strength of faith, but the truth of faith; not upon the brightest degree, but upon any degree of faith. It is not said, If you have such a degree of faith you shall be justified and saved; but simply believing is required. The lowest degree of true faith wilt do it . . .”
– William Greenhill, An Exposition on the Prophet Ezekiel
“A weak faith is true. The bruised reed is but weak, yet it is such as Christ will not break. Though thy faith be but weak, yet be not discouraged. A weak faith may receive a strong Christ: a weak hand can tie the knot in marriage as well as a strong; a weak eye might have seen the brazen serpent. The promise is not made to strong faith, but to true. The promise doth not say, Whosoever hath a giant faith that can remove mountains, that can stop the mouth of lions, shall be saved; but whosoever believes, be his faith never so small.”
– Thomas Watson, A Body of Divinity
“Weak faith will as surely land the Christian in heaven as strong faith, for it is impossible the least dram of true grace should perish…”
– William Gurnall, The Christian in Complete Armour
And the one shot more powerful than these three:
“For truly, I say to you, if you have faith like a grain of mustard seed, you will say to this mountain, ‘Move from here to there,’ and it will move, and nothing will be impossible for you.”– Matthew 17:20