If you want to be mentally strong, stop stewing on negative thoughts and feelings. Think positive.

如果你想坚强，就不要纠结于负面的想法和感受。要积极乐观地考虑问题。

youdao

After that I might only be able to play games here and there, who knows, but I think I can be an influence and be positive and win games and be strong for two years.

打从心底里我觉得我还能以良好的状态打两年，而这段时间内我的发挥也将左右许多东西。

youdao