Anas bin Malik (may Allah be pleased with him) relates that the Holy Prophet Muhammad (peace and blessings of Allah be to him) said: There are three qualities; whosoever have them may test the sweetness of faith: first, one who loves Allah and His Messenger above all else; secondly, one who loves someone simply for the sake of Allah; and thirdly, one who returns to disbelief after Allah has rescued him from it, as he abhors being thrown into the fire (of hell).
(Bukhari, Muslim)
Man wants to submit to a Supreme Being, but he does not know how. He also does not know the importance of whom he wants to submit to. In this hadīth the Blessed Prophet has put it in the right order: one who loves Allah and His Prophet more than all others and loves someone else simply for the sake of Allah can taste the sweetness of faith. His heart lights up with faith and he becomes steadfast. The companions of the Holy Messenger often used to address him: ‘O Messenger of Allah, our parents are subordinates to you.’
No doubt, a man loves his parents, wife and children. But the life of the Holy Messenger teaches the believers the extent of this love. On listening to the call for prayers, the Holy Messenger used to rush to the mosque as if he had nothing to do with them.
When a person changes over to Truth from falsehood, he should not backtrack, but stick to his gun, however sufferings he may have to bear.