Characteristics of speech and preaching that demonstrates the Spirit and Power of God

Speech and preaching that  demonstrates the Spirit  and the power of God focuses on the following:

a) Things that God has prepared for those who love Him...

b) Things that are freely given to us by God...

c) The deep things of God...

d) All the things that the Holy Spirit searches out and reveals to God's people!

This kind of speech and preaching builds our faith up and makes it to stand by the power of God!