If I asked you what the opposite of “coward” was, what would you say? Maybe something like “fierce” or “strong.” But in his letter to Timothy, Paul says that God didn’t give us a spirit of cowardice; but rather, power, love, and self-control. That implies that those three things are in contrast to cowardice.
To quote Spider-Man, “With great power comes great responsibility,” which is why power is only one of three things. The responsibility that comes with this power is to love and have self-control. We’ve been called to love God and our neighbor (all of them… not just the ones that agree with us). We’ve been called to temperance, which means that we need to sometimes suppress desires that don’t align us with Christ and the Church. Luckily, it’s a cycle; we have these responsibilities because of the power we’ve been given, but we can fulfill these responsibilities because of that same power, so don’t be a coward.