I truly believe that one of the things that has been lacking in America is a spirit of repentance about the injustices of slavery and the injustices of segregation and racism generally. I truly believe that we cannot come to a place of reconciliation until there is individual repentance and corporate repentance.

When you reflect upon the significance of Dr. King to this nation, it's criminal that he hasn't had a feature film that was centered around him until now. That, in and of itself, was emotional. But when you're doing scenes on the Edmund Pettus Bridge, with people still living in Selma and now in their 60s and 70s who had actually marched, who were there that original Bloody Sunday, that's humbling... that's deeply moving. You're no longer acting at that stage, you're just reacting, because it takes the filmmaking process to another dimension.

I truly believe slavery is why, as a by-product, we still have a disproportionate amount of black men incarcerated in America. It is an extension of that legacy, and that's not going to start to diminish until black people have a new sense of themselves that isn't tied to slavery and feeling inferior. I think the church can be instrumental in that, in terms of repentance, reconciliation and just being more embracing of each other - not just on Sunday, but in life generally.

That's what's so satisfying about acting. You can come as prepared as you like, but there's no accounting for what's going to come at you from the other actor. That's part of the joy and the play of it. If you don't have that it's a different kind of performance.

If you merely focus on what we already know, then it's not revelatory. You may as well just go and watch a documentary or a few videos on Youtube, and you're good.

Africa is trying to find its way back to a sense of itself, when much of that was lost through colonization.

I think that having a black president in America has been a seismic shift, in terms of what has been going on racially in America. I think that America is now engaging with how we have come to this point.