Have you ever been in a situation where it was difficult to witness to someone? Perhaps you have been in a situation where it may have seemed easier not to witness to another person. However, this is not the appropriate thing to do.
Paul faced many persecutions during his missionary travels, eventually dying a martyr's death around 64 A.D. If anyone faced difficulties in spreading the Gospel, it was Paul! He was shipwrecked, imprisoned, and nearly stoned to death, among other things. Neither the Jews nor the Romans were very friendly towards Christians! However, Paul did not give up.
Instead of giving up when persecution came, Paul pressed on. He continued to spread the Gospel. He wrote to the church at Rome that he was not ashamed of the Gospel. If Paul faced such great persecutions, yet still pressed on in spreading the Gospel, should we not also press to spread the Gospel? The answer is that we should continue to spread the Gospel, despite hindrances that may arise. We should be unashamed of the Gospel.
It is not enough to simply say that we are unashamed of the Gospel. Rather, we must show it. It is precisely in the moments when it seems most difficult for us to share the Gospel with someone that we most need to share the Gospel. In other words, the difficult times matter. Whatever our situation, today we can choose to live without being ashamed of the Gospel. After all, it is Christ that made the ultimate sacrifice to save us from our sins. No one else did. Therefore, His opinion is the only one that matters.