If the knowledge you need is lacking, you will perish.

You will perish, not because you're idle or indifferent about all you face that's undesirable.

You'd perish, not because you're not bothered about your present circumstances that preced an inevitable perishing if your want of knowledge persists.

You'd perish simply because you lack knowledge.

Humans must be deliberate about acquiring knowledge. It is knowledge that distinguishes one human from another.

Spiritual knowledge.

Knowledge...