Why the temptations?

Blessed is the man who remains steadfast under trial, for when he has stood the test he will receive ^vthe crown of life, ^wwhich God has promised to those who love him. 13 Let no one say when he is tempted, “I am being tempted by God,” for God cannot be tempted with evil, and he himself tempts no one. 14 But each person is tempted when he is lured and enticed by his own desire. 15 Then desire ^xwhen it has conceived gives birth to sin, and ^ysin when it is fully grown brings forth death.

16 Do not be deceived, my beloved brothers. 17 ^zEvery good gift and every perfect gift is from above, coming down from ^athe Father of lights, ^bwith whom there is no variation or shadow due to change. 18 ^cOf his own will he ^dbrought us forth by the word of truth, ^ethat we should be a kind of ^ffirstfruits of his creatures.