6 types of material a person may metaphorically build the church with

1 Corinthians 3:11-15

For no one can lay any foundation other than the one already laid, which is Jesus Christ. If anyone builds on this foundation using

gold,

silver,

costly stones,

wood,

hay

or straw,

their work will be shown for what it is, because the Day will bring it to light. It will be revealed with fire, and the fire will test the quality of each person's work. If what has been built survives, the builder will receive a reward. If it is burned up, the builder will suffer loss but yet will be saved - even though only as one escaping through the flames.

9 Characteristics of an Apostle as listed in 1 Corinthians 4

1 Corinthians 4:11-13

To this very hour

we go hungry and thirsty,

we are in rags,

we are brutally treated,

we are homeless.

We work hard with our own hands.

When we are cursed, we bless;

when we are persecuted, we endure it;

when we are slandered, we answer kindly.

We have become the scum of the earth, the garbage of the world

 - right up to this moment.

3 pointed contrasts between Paul and the Corinthians, 1 Corinthians 4:10

1 Corinthians 4:13
We are fools for Christ, but you are so wise in Christ!
We are weak, but you are strong!
You are honoured, we are dishonoured!