Heidelberg Catechism · 1563

Q64. Does this teaching not make people careless and wicked?

No. It is impossible that those grafted into Christ by true faith should not bring forth fruits of thankfulness.
Answer · Heidelberg Catechism

Scripture proofs

  1. [1]
    Matthew 7:18

    A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit.

    Luke 6:43-45

    For a good tree bringeth not forth corrupt fruit; neither doth a corrupt tree bring forth good fruit. For every tree is known by his own fruit. For of thorns men do not gather figs, nor of a bramble bush gather they grapes. A good man out of the good treasure of his heart bringeth forth that which is good; and an evil man out of the evil treasure of his heart bringeth forth that which is evil: for of the abundance of the heart his mouth speaketh.

    John 15:5

    I am the vine, ye are the branches: He that abideth in me, and I in him, the same bringeth forth much fruit: for without me ye can do nothing.

Proof texts as given in the original; verse text from the King James Version.