越是不肯轻易将真情流露的人，他的情感往往越真挚。

【翻译】feeling 和emotion 是同义词，分别使用是为了避免重复。

1. The less easily one reveals his true feelings, the more sincere emotions he tends to have.

2. Those who do not easily reveal their true feelings tend to have more sincere emotions.

第1句采用表示递进关系的复合句：The more...，the more...

第2句使用定语从句。