Anas bin Malik relates that Allah’s Messenger Muhammad (peace and blessings of Allah be to him) said: There are three qualities; whosoever have them may taste 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 abhors return to disbelief after Allah has rescued him from it, as he abhors being thrown into the fire (of hell).
(Bukhari, Muslim)
Man is submissive by nature and has an instinct of loving. He wants to submit to and love a Supreme Being, but he does not know how to. He also does not know the right order of importance of whom he wants to love. This hadīth puts it in right order: one who loves Allah and His Messenger more than all others, loves someone else for the sake of Allah and abhors return to disbelief can taste the sweetness of faith. His heart lights up with faith and he becomes steadfast.
A man loves his parents, wife and children. If his parents ask him to do something un-Islamic, his love for Allah emerges. If a parent sees his child avoiding obligatory prayers or doing something un-Islamic, his love for Allah requires him to take particular care of it. A steadfast Muslim does not join the company of persons who are against Islamic teachings.
Also, when one changes over to Truth from falsehood, one should not backtrack but stick to one’s gun, whatever sufferings he may have to bear.