Beware, don't be self-centered because it destroys your good deeds. Don't you know that a companion of Hazrat Isa (a.s.) started walking on water by saying Bismillah'; and in the midst of water he thought Now I have also become like Hazrat Isa' and he started drowning. He complained. Hazrat Isa (a.s.) saved him. When he asked the reason for drowning, Hazrat Isa (a.s.) said it was because of his self praise and arrogance. He was asked to beg for Allah's forgiveness. He begged Allah for forgiveness and again he started walking on water by saying Bismillah.'(Furu-e-Kafi - 2, p. 306)