The Day every soul will find what it has done of good present [before it] and what it has done of evil, it will wish that between itself and that [evil] was a great distance. And Allāh warns you of Himself, and Allāh is Kind to [His] servants."
On the Day of Resurrection every person will find the good that he did in front of him, without any deficiency. Those who did bad will wish that there was a great distance between them and their bad actions – but shall a desire will be worthless! Allah warns you of Himself, so do not become the subject of His anger by committing sins. Allah is kind to His servants and therefore gives them this warning.