Rasul Allah (sal Allahu alaihi wasallam) said: “He is successful who has accepted Islam, who has been provided with sufficient for his wants and been made contented by Allah with what He has given him.” [Muslim]
Nowadays when people say, ‘So and so is very successful’ what they mean is, ‘He/she is making a lot of money.’ In the above mentioned hadith Allah (subhana wa ta’ala) explains who qualifies to be called successful. It’s not having Car X, House in W and Job Z but:
1. Islam.
2. Needs fulfilled.
3. Possession of a thankful heart.