Acts 20:28-30 (AMP)
Take care and be on guard for yourselves and for the whole flock over which the Holy Spirit has appointed you as overseers, to shepherd (tend, feed, guide) the church of God which He bought with His own blood. 29 I know that after I am gone, [false teachers like] ferocious wolves will come in among you, not sparing the flock; 30 even from among your own selves men will arise, speaking perverse and distorted things, to draw away the disciples after themselves [as their followers].
2 Timothy 4:1-5 (AMP)
I solemnly charge you in the presence of God and of Christ Jesus, who is to judge the living and the dead, and by His appearing and His kingdom: 2 preach the word [as an official messenger]; be ready when the time is right and even when it is not [keep your sense of urgency, whether the opportunity seems favorable or unfavorable, whether convenient or inconvenient, whether welcome or unwelcome]; correct [those who err in doctrine or behavior], warn [those who sin], exhort and encourage [those who are growing toward spiritual maturity], with inexhaustible patience and [faithful] teaching. 3 For the time will come when people will not tolerate sound doctrine and accurate instruction [that challenges them with God’s truth]; but wanting to have their ears tickled [with something pleasing], they will accumulate for themselves [many] teachers [one after another, chosen] to satisfy their own desires and to support the errors they hold, 4 and will turn their ears away from the truth and will wander off into myths and man-made fictions [and will accept the unacceptable]. 5 But as for you, be clear-headed in every situation [stay calm and cool and steady], endure every hardship [without flinching], do the work of an evangelist, fulfill [the duties of] your ministry.
Hebrews 2:4 (AMP)
[and besides this evidence] God also testifying with them [confirming the message of salvation], both by signs and wonders and by various miracles [carried out by Jesus and the apostles] and by [granting to believers the] gifts of the Holy Spirit according to His own will.
2 Corinthians 4:6 (NRSV)
For it is the God who said, “Let light shine out of darkness,” who has shone in our hearts to give the light of the knowledge of the glory of God in the face of Jesus Christ.
1 Timothy 1:14 (AMP)
The grace of our Lord [His amazing, unmerited favor and blessing] flowed out in superabundance [for me, together] with the faith and love which are [realized] in Christ Jesus.