Amen. Most every one of us starts out with a mustard seed of faith. If that is what we end up with, that still suffices to bring us to Him, if God so wills.
One of my favorite sermons by Charles Spurgeon begins with the Bible verse "For who has despised the day of small things?" -- and concludes with...
"...We don't want the seed forever in the corn-bin: let it be scattered and it will give us more. Oh! brethren and sisters, wake up if any of you are asleep. Don't let an ounce of strength in this church be wasted--not a single grain of ability, either in the way of doing, or praying, or giving, or holy living. Spend and be spent, for who hath despised the day of small things? The Lord encourage weak believers, and the Lord accept the efforts of feeble workers, and send to both his richest benediction for Christ's sake. Amen.