Do nothing out of selfish ambition or vain conceit
Ambition is not necessarily a bad thing. We all have, or at least had, some ambitions in life. It's good to aim high and to seek to achieve things, but at what cost and for whose glory?
When our ambitions are self-centred, when they use others for our own ends, then those ambitions are surely destructive and counter-kingdom. Jesus said, "Seek first the kingdom of God", in other words make God's purposes your highest priority. Remember too that your heart will follow what you most value.