Acts 2 : 36 37

36 Therefore let all the house of Israel know assuredly, that God hath made that same Jesus, whom ye have crucified, both Lord and Christ.
37 Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do?

Reference:

Neill F. Marriott Second Counselor in the Young Women General Presidency, LDS General Conference April 2016

What is the scriptural or historical context of this scripture:

Peter is testifying of Christ. He doesn't hold back and tells hard truths when called upon by the spirit to do so.

Related Scriptures

Peter standing and boldly testifying of who Jesus was and is reminds me of the story of Abinadi in Mosiah 12:18–19. However with Peter, the people hearing his testimony are moved to repentance. Only Alma is touched by the words of Abinadi.

Thoughts about this scripture:

Sometimes we are afraid of how people will react if we tell them our feelings of testimony. We may worry that we will be rejected. We may not worry that we will be crucified or burned at the stake for our faith in Christ, but today we have all witnessed the virtual tarring and feathering of other people on social media for things they have said. Peter's example teaches us to fear not. To stand boldly. To bear testimony of Christ and his divinity.

How does this strengthen my testimony

"What shall we do?" is the question. The answer is to go forth and let the light of our testimony shine. Bearing a simple yet strong witness that Jesus is the Christ is a powerful thing. We don't have to answer and explain to the world all things. We can share what we know to be true.

What shall we do? We shall testify of Christ.