贾斯汀·比伯的励志歌词包括以下几首：

《Never Say Never》

"See I never thought that I could walk through fire"

"I will never say never. （I will fight） I will fight till forever. （make it right）"

《Runaway Love》

"And I need your love"

"Pull me up （Pull me up）使我停止（下沉） I can't swim on my own"

《Up》

"I got money in my hands That I'd really like to blow"

"Swag swag swag 挥霍 挥霍 挥霍 On you 为你"

《Believe》

"Baby, take a chance 亲爱的如果不试一试 Or you'll never ever know"

这些歌词都充满了正能量和励志的精神，鼓励人们坚持梦想，勇敢面对挑战，永不言弃。