失败以后，他的内心变得更强大了。

Shībài yǐhòu, tāde nèixīn biàn de gèng qiángdà le.

After failing, his heart became stronger.

他的内心其实很温柔。

Tā de nèixīn qíshí hěn wēnróu.

His heart is actually very gentle.

保持内心的平静，对学习很有帮助。

Bǎochí nèixīn de píngjìng, duì xuéxí hěn yǒu bāngzhù.

Keeping inner peace is very helpful for studying.