Must I Understand Everything Before I Believe?

The first question is: is this source true? Is there a Creator, has He spoken, is this book His speech, was this man His messenger? That question is answered by evidence, and the Qur'an invites you to examine it as hard as you like.

The second question is: why did He command this particular thing? That is a question about wisdom, and it may have an answer you can find, an answer you can partly find, or an answer you cannot reach at all.

The mistake is to make the second question a condition for the first. If you have become convinced — on sufficient evidence — that Allah is your Creator, the Qur'an is His revelation and Muhammad ﷺ is His Messenger, then meeting a command whose full wisdom escapes you does not logically undo any of that. It only tells you that you are not God.

The Qur'an places two short phrases against each other. Both begin with the same word — 'we hear'. They end very differently.

The first is spoken at Mount Sinai. The Children of Israel had been given the covenant and commanded to hold to it firmly and listen. The Qur'an records their response — not necessarily in words, the commentators note, but in conduct: they heard, and then turned to the calf.

The Prophet's companions did not obey because every command was explained to them. Umar ibn al-Khattab, kissing the Black Stone during pilgrimage, said openly that he knew it was a stone that could neither harm nor benefit, and that he kissed it only because he had seen the Prophet ﷺ do so. Ali ibn Abi Talib, on wiping the top of leather socks rather than the underside during ablution, remarked that if religion were based on opinion the underside would have made more sense — but he did what he had seen the Messenger do.

These were not unthinking men. They had done their thinking about the source. Once the source was established, they trusted it over their own guesses about the wisdom of its details.

Suppose you find that a great deal of what the Qur'an says checks out — about God, about the human condition, about history, about how to live — and you meet a handful of commands whose reasons you cannot see. Should the handful cancel the whole? In no other area of life would you say so. You do not abandon a trusted physician over one prescription you do not understand; you ask, you learn, and in the meantime you take the medicine.

That is an illustration. It is not a mathematical argument, and no percentages are being claimed. The actual basis for trust is the evidence for the source — which is why this site spends so much time on it.

Investigate the source seriously. Read the Qur'an. Study the life of the man who brought it. Test the claims that can be tested. Then, if you are convinced, do not let the limits of your own understanding pretend to be limits on God's wisdom. Ask about the reasons — Muslims have always asked — but obey while you ask.

The Qur'an's own closing instruction to the seeker is the same: do not follow what you have no knowledge of, and do not pretend to knowledge you do not have.