Hi Reg,
I believe that the Spirit will lead us to stand up for this truth when we need to. We are all have different type of personalities, some will interject themselves into conversations and voice their opinion about this truth. That has never been my style and I don't believe I should necessarily force myself to do what I see others doing, but let the Spirit show me what to do. We have to be careful that our boldly proclaiming truth is to the glory of God, and not more on the lines of boosting to others what we think we know.
John 7:18 He who speaks from himself seeks his own glory; but He who seeks the glory of the One who sent Him is true, and no unrighteousness is in Him.
If the Spirit wants us to stand up for the truth, then we cannot resist Him working in/through us, it will move us when to speak, as it is teaching us we will do the will of God. The Apostles were delivered up before judges, I see us as more like being delivered up before family, friends and coworkers, if we are put on the spot God will give us the answer to speak.
Mat 10:19 But when they deliver you up, do not worry about how or what you should speak. For it will be given to you in that hour what you should speak;
v. 20 for it is not you who speak, but the Spirit of your Father who speaks in you.
mercy, peace and love
Kat
p.s. Mark 13:11 But when they arrest you and deliver you up, do not worry beforehand, or premeditate[3] what you will speak. But whatever is given you in that hour, speak that; for it is not you who speak, but the Holy Spirit.