从前我本一生了无牵挂直至遇到命中注定的她
[cóng qián wŏ bĕn yī shēng le wú qiān guà zhí zhì yù dào mìng zhōng zhù dìng de tā]
'Once I lived carefree until I met my destined one.' It signifies a change in someone's outlook on life because of meeting the person they are fated to be with.