Sentence:  Now observe, my dear Sir, I don't for a moment push my little but honest Religious faith upon poor Keats, except as far as my feelings go, but these I try to keep from him. I fall into his views sometimes to quiet him and <WSD>tincture</WSD> them with a somewhat of mine, ... 
Meaning of the word marked with <WSD> tags:  To tinge; to taint.