Not Everyone Who’s Gained Some Knowledge Can Defend It

Imām Ibn Taimiyyah, may Allāh have mercy on him, said:

Not everyone who’s gained [a piece of] knowledge can express it clearly and argue on behalf of it, for knowledge is one thing and making it clear, another; arguing on behalf of it and establishing its proofs, [yet] a third; and responding to the arguments of [one’s] opponent, a fourth.

Jawāb Al-Iʿtirāḍāt Al-Maṣriyyah, p. 44.