Can you the source of someone else's testimony?
Can you cause someone to testify of God's goodness because you have opted to be His instrument by extension? Can you purpose to see and serve others first before you can uphold and pursue your own interests (Phil. 2:4KJV)? Can you choose to let love lead so that Christ can prevail wherevers you go, and in all circumstances as pertaining to your own life?
Can you choose to surrender in order to be an obedient, fully and unreservedly available vessel, dedicated for God's exclusive use? There better gain in releasing and giving away because seed germinates and multiplies only after being planted in (a fertile) soil. Grace yields abundance o ly when it finds and operates through a willing tool. When others can see Jesus through us, and come to the knowledge of God because we are in the business of mirroring Him, then we are in a fruitful growth process.
There is no better testimony than that, both for ourselves, and the community we influence and impact, around us even beyond. Lord, help us to be perfected instruments day after day so that we effectively and consistently contribute to the harvest of souls marked for your Kingdom. We will then rejoice in your assignment, as we imprint a legacy that eternally honors Your Name.