then spake tuor : `` nay , if thou dost not now dare greatly then will the orcs dwell for ever and possess in the end most of the mountains of the earth , and cease not to trouble both elves and men , even though by other means the valar contrive hereafter to release the noldoli ; but if thou trust now to the valar , though terrible the encounter , then shall the orcs fall , and melko 's power be minished to a little thing . ''