Are you referring to sharing the Gospel with others, or something else? God’s word never returns void, right? And that means that God’s word is sovereign and will accomplish what He set it out to do, not what we set it out to do, right? It may seem what we share has no value to others, but that’s not our place to know from what we are shown or told. After all, it’s not our will to be done, but His. 
And in the end, that’s the only important wisdom for us to share, correct?