Abu Hurairah relates Allah’s Messenger (peace and blessings of Allah be to him) as saying, “A strong believer is better and more loveable to Allah than a weak believer, and there is good in everyone, (but) cherish that which gives you benefit (in the Hereafter) and seek help from Allah and do not lose heart, and if anything (in the form of trouble) comes to you, don’t say: If I had not done that, it would not have happened so and so, but say: Allah did that what He had ordained to do and your ‘if’ opens (the gate) for the Satan.”
(Sahih Muslim)
Thishadīth is very significant in the sense that it determines the role of Destiny in the life of a believer. To a true believer, belief in Divine Decree is a source of unfailing strength and power. It makes him a powerful person of invincible will and firm determination and strong conviction. Thus failures or so-called misfortunes of life neither dampen his spirit nor make him a pessimist. A true believer faces the hardships of life bravely and manfully with the strong hope that God would help him overcome them. And even if he fails to overcome them here in the earthly life, he would have his reward in the Hereafter.
A believer has his eyes set on the future and hand in the living present and does not waste his time in the involvement of ‘ifs’ and ‘buts’. This hadith teaches him to be strong in faith, physique and everything possible.