Let us beware of the beginnings of backsliding, however small. We never know what we may come to, if we once leave the king’s highway. The professing Christian who begins to say of any sin or evil habit, “it is but a little one,” is in imminent danger. He is sowing seeds in his heart, which will one day spring up and bear bitter fruit. It is a homely saying, that “if men take care of the pence the pounds will take care of themselves.” We may borrow a good spiritual lesson from the saying. The Christian who keeps his heart diligently in little things shall be kept from great falls.
~ J.C. Ryle
Expository Thoughts on the Gospels: Luke volume 2 , [Carlisle, PA: Banner of Truth, 1998], 436, 437.