Deliberation requires understanding the situation, checking the essential facts, and deciding without anger or needless anxiety. Indecision is different: a person may keep postponing a necessary decision even after the relevant facts are clear.
Consider a message accusing a classmate of misconduct. Forwarding it immediately is haste; checking the facts and avoiding an unjust accusation is deliberation.
If someone needs urgent assistance, prompt and safe help can be the thoughtful response. Deliberation is about sound judgment, not about always taking more time.