His example of standing up for the truth is easy, because it is simply undeniably true that he is gay and his partner is a man. He can correct wrong assumptions from the comfortable position of what is actually the case in 'reality'.
Unfortunately, in most cases the truth you want to defend is in the gray of philosophy, ethics, politics, aesthetics, where you yourself may even agree something isn't a universal truth. Then you're not defending the truth: you are preaching.
His example of standing up for the truth is easy, because it is simply undeniably true that he is gay and his partner is a man. He can correct wrong assumptions from the comfortable position of what is actually the case in 'reality'.
Unfortunately, in most cases the truth you want to defend is in the gray of philosophy, ethics, politics, aesthetics, where you yourself may even agree something isn't a universal truth. Then you're not defending the truth: you are preaching.