Building the Kingdom of God is significantly more than buildings. It is, in fact, the growth of people in and into the Kingdom. It's an amazing privilege that we enjoy as believers in Jesus.
It is something that we should be conscious of and prepared to support. We do so by being holy people ourselves, demonstrating God's love through light and heavy days. As sanctified, joy filled witnesses, our testimony convincingly will shine in the darkness for others to see and desire. Their interest will be drawn to the warmth and light of God, all the while, building His Kingdom. Let's bring as many as we can with us.
2 Peter 1:10-11 (MSG)
10 So, friends, confirm God's invitation to you, his choice of you. Don't put it off; do it now. Do this, and you'll have your life on a firm footing,
11 the streets paved and the way wide open into the eternal kingdom of our Master and Savior, Jesus Christ.