Honesty is in the eyes of the beholder.......I assume that no one is honest until I feel that I know them well enough to prove "consistency"........if someone is proven to love me then I can take a bit of a gamble with their honesty.
It is a hard one......truth. Truth is a perception and is tainted with bias.
I would concentrate on what YOU want from yourself......once you practice that, other people tend to also give you what you want......which is honesty.
Be true to yourself and others will follow.....good luck!