Lied about Luke's father Obi-Wan did. Forgot to tell him about who his father really was both Yoda and Obi-Wan did. Also forgot to tell him about his sister both both Yoda & Obi-Wan did. At least Obi-Wan came clean on this eventually. Also forgot to tell him how his mother was killed Obi-Wan did. Yoda & Obi-Wan were interested in the greater good, yes. So in terms of the ends justify the means they succeeded, but that will not change how I view them and their methods. Now some would argue that the deceptions of Yoda & Obi-Wan served to protect Luke, but I don't see it that way. The deception served to protect their agenda of removing Palpatine. Luke's own emotional well being was a secondary concern, if a concern at all.