-I was sure
不应是‘ I was sure',除非你以前确定现在动摇了,应该是 'I am sure' 才对.
-these were
应该是in present tense,原因如上.
- by which I’ve ever been deeply touched.
有些罗嗦了.
which have touched me deeply.
我的答案：I am sure that these are the mottos which have touched me deeply.
除非你想表达的是这些是曾经让你感动过,现在不感动的话.