Greek
4102. pistis -- faith, faithfulness ... do not struggle in the
power of the will .
... of religious truth, or the truthfulness
of
God or a
... by extension, the system of religious (
Gospel) truth itself
... /greek/4102.htm - 18kTorrey's TopicalTextbook
Romans 1:16For I am not ashamed of the gospel of Christ: for it is the power of God to salvation to every one that believes; to the Jew first, and also to the Greek.
Torrey's Topical Textbook—AKJV1 Corinthians 1:18
For the preaching of the cross is to them that perish foolishness; but to us which are saved it is the power of God.
Torrey's Topical Textbook—AKJV
1 Thessalonians 1:5
For our gospel came not to you in word only, but also in power, and in the Holy Ghost, and in much assurance; as you know what manner of men we were among you for your sake.
Torrey's Topical Textbook—AKJV