One of the greatest challenges in my life is to identify motives. In the Bible, Jesus was incredibly accurate about detecting people's motives. Some preachers were able to sense a person's righteousness or ulterior motives, Rev. Stephen Tong said he could usually tell a person's "4 seasons" by just looking at their faces.
No doubt, this is a very sensitive matter, because motives can easily be misinterpreted with damaging consequences. As a result, some believe that we should stay away from people's motives. I think, that it is not wrong to admit our limits, but to stop others from exceeding our limits, is rather selfish, it would only result in more ignorance or jealousy. It is better to admit it our individual limits, and be quiet.
More is required from those who are given more. Those who are given more cannot treat matters lightly. They must know whatever anger they control, it must be for the sake of God's glory.
Often times, I find myself too trusting people. However, it is also important that I remind myself not to later cast doubts on everyone else. So that I remain sober, marching forward for God.
Conclusion, it is important to be wise as serpents, however, in the end, it is better to be fooled once, than to accuse wrongly.