This is an icon of the martyrdoms of numerous Holy Saints, including Sts. Peter and Paul (all the way to the right), Sts. Manuel, Sabel and Ishmael, Sts. Leontios, Ypatios and Theodoulos and St. Timon. (The rest going left to right). The Icon is courtesy of www.eikonografos.com used with permission.
I think the following is such a beautiful quote from St. Theophan the Recluse. It really puts in perspective the motivation of both the martyrs and the holy ascetics (which is in fact, one and the same):