As though to say, “My belief is perfect: here is the witness!” (Yes), but there is doubt as regards the witnesses.
تزکیه باید گواهان را بدان ** تزکیش صدقی که موقوفی بدان
Know that the probity of the witnesses must be established: the means of establishing it is a (great) sincerity: thou art dependent on that.
حفظ لفظ اندر گواه قولیست ** حفظ عهد اندر گواه فعلیست
In the case of the word-witness, ’tis keeping thy word (that is the test); in the case of the act-witness, ’tis keeping thy covenant (to perform these acts).