Store the "weapons of Dhamma"...

"Just as the royal frontier fortress has many weapons stored, both arrows & things to be hurled, for the protection of those within and to ward off those without; in the same way...



.....the disciple of the noble ones has heard much, has retained what he has heard, has stored what he has heard. Whatever teachings are admirable in the beginning, admirable in the middle, admirable in the end, that — in their meaning & expression — proclaim the holy life that is entirely complete & pure: those he has listened to often, retained, discussed, accumulated, examined with his mind, and well-penetrated in terms of his views.



With learning as his weapons, the disciple of the noble ones abandons what is unskillful, develops what is skillful, abandons what is blameworthy, develops what is blameless, and looks after himself with purity.
http://www.accesstoinsight.org/tipitaka/an/an07/an07.063.than.html#learning