I see this being especially detrimental when we take it into our walk with the Lord. We look at how someone else worships or how much of the Bible they know or how they serve and start to compare our own life against theirs to find out where we "rate." I used to feel such a sense of inadequacy as a Christian because I had never prayed the sinner's prayer with anyone. I felt like since I never brought someone to the Lord, what good have I possibly done for the Kingdom of God? Isn't that exactly what Satan wants us to think.
I was recently talking with a dear Christian friend who definitely seeks the approval of others. She was noting how confident other people seem and was asking for prayer that she could have a "backbone" and speak with greater boldness without so much anxiety about about what others thought. I told her I wouldn't pray that for her (so rude, right?). What I believed she was failing to see was how God was using her gentle warm friendly spirit to welcome people who otherwise wouldn't know or talk to anyone. The reason why she might not tend to speak with conviction into someone's life is because God effectively uses her to be a place of safety and comfort, not for telling hard truths. I know this because she's done so for me. I wanted her to see her gift in the light of God's plan and not an earthly comparison. Instead I prayed for her that she would obey only the Holy Spirit to lead where He follows and regardless of what it looks like, she would be filled with a divine peace knowing her purpose, whether in boldness or quiet obedience. And if she leaves a situation without speaking with boldness, that she could trust The Lord has equipped someone else to do so. I pray the same for you: that you would use YOUR unique gifts and strengths to their fullest divine potential without any earthly measuring stick involved.