One belief is that which is firm and steadfast in hearts, and one is that which remains temporarily in the heart and the breast up to a certain time. If you were to acquit (yourself) before any person, you should wait till death approaches him, for that is the time limit for being acquitted.
And migration stands as its original position. Allah has no need towards him who secretly accepts belief or him who openly does so. Migration will not apply to any one unless he recognises the proof (of Allah) on the earth. Whoever recognises him and acknowledges him would be muhajir (migrant). Istid`af (freedom from the obligation of immigration) does not apply to him whom the proof (of Allah) reaches and he hears it and his heart preserves it.
Certainly, our case is difficult and complicated. No one can bear it except a believer whose heart Allah has tried with belief. Our traditions will not be preserved except by trustworthy hearts and (men of) solid understanding. O' people! ask me before you miss me, because certainly I am acquainted with the passages of the sky more than the passages of the earth, and before that mischief springs upon its feet which would trample even the nosestring and destroy the wits of the people.