Verse 40 - Meaning:
Q: What (kim) is the weapon (sastram - NOT sAAstram) available for all ?(sarvesaam)
A: The power of reasoning. (yuktih)
Q:Who (kaa) is the common mother (maataa-ca) of all ?
A: The cow. (dhenuh)
Q:What (kim) army can protect us ? (balam)
A: One's own courage.(yad dhairyam)
Q:What (ko) is the cause of destruction (mrtyuh) ?
A: A lazy and listless attitude of mind.(yad avadhaana-rahitatvam)