2:5 Those are on guidance from their Lord. And those, they are the successful.
Those who fulfilled the criteria mentioned in the two ayah previously are those who have taqwa. They are those who shall obtain guidance through Qur’an (ayah 2).
The muttaqin receives guidance from their Lord. This again shows that Allah has the absolute power to influence our fate. This is in contrast to some people (e.g. the qadariyyah) who claimed that men are owner of their own fate, faith and creator of their own guidance.
Falah comes from root word falh meaning splitting or cleaving.
Tillage on earth when is was ploughed for cultivation is called filaaha.
The successful is the one who cuts through adversity until he reaches his goals.
Meaning success will only come after adversity.
Successful here means attain Paradise and avoided hellfire. True success is in the hereafter. This world is a test.