I think the idea of "courage" in Gilgamesh is more complicated than it might seem. Both Gilgamesh and Inkidu are strong and brave, but their courage comes from their friendship and bond as brothers. One example of this is how it through working together they are able to defeat Humbaba. At first, Inkidu is afraid of challenging Humbaba, and Gilgamesh has to convince him to be brave (see p 93). Later, after they enter the cedar forest, Gilgamesh is scared, but Inkidu reassures him, saying that "two boats lashed together will never sink," (p 122) meaning that as long as they work together, they will triumph. Inkidu is also the one who convinces Gilgamesh to be brave and cut off Humbaba's head (p 127).