your fruit or works are generally proof of salvation.
Matthew Chapter 7

17 Even so every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit.

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

19 Every tree that bringeth not forth good fruit is hewn down, and cast into the fire.

20 Wherefore by their fruits ye shall know them.