The Contemplative And The Warrior

Homo formidoloso et corde pavido non egredietur ad bellum. Vadat et revertatur ad domum suam, ne pavere faciat corda fratrum suorum, sicut et ipse timore perterritus est. Quibus verbis edocet non posse eos professionem contemplatinois vel spiritualis militiae arripere exercitium, qui adhuc nudari terrenis operibus pertimescunt. Ne rursus infirmitate mentis revertantur, suoque exemplo alios a perfectione evangelica revocent, et infideli terrore infirment; jubentur itaque tales, ut, discedentes a pugna, revertantur in domum suam, quia non possunt duplici corde bella Domini praeliari. Vir enim duplex animo, inconstants in omnibus viis suis. Tales quippe oportet ut ne initium quidem renuntiationis arripiant. Quibus melius est ut un activa vita consistant, quam trepidi contemplationem exsequentes, majori discrimine semetipsos involvant. Melius est enim non vovere, quam vovere et non reddere. Similiter et ille a tali militia prohibetur, qui uxorem duxerit, qui plantaverit vineam, velt propaginem filiorum, non enim potest servire divinae militiae servus uxoris, secundum Apostoli: Qui cum uxore est, sollicitus est quomodo placeat uxori, et divisus est.  Nec potest inesse quis studio contemplationis, qui adhuc in delectatione defigitur carnis. Nemo, inquit Apostolus, militans Deo, implicat se negotiis saecularibus, ut ei placeat cui se probavit. Sanctus Isidorus Hispalensis,Mysticorum Expositiones Sacramentorum Seu Quaestiones In Vetus Testamentum, In Deutronomium, Caput XV Migne PL 83.365-366

A man fearful and timid in heart should not go out to war. Let him begone and return to his house lest he causes fear in the hearts of his brothers, with his own fear unnerving them. 1 By which words is taught that they are not able to take up the exercise of contemplation or spiritual warfare who yet fear to strip themselves of worldly works, lest again they fall back into weakness of soul and their example calls others away from the perfection of the Gospel, and by faithless fear others are made infirm. Such men are thus ordered to withdraw from combat and return to their own houses because they who have divided hearts are not able to fight the wars of the Lord; a man with a divided soul is inconstant in all his ways. And certainly they should not even start on the beginning of renunciation; it is better for them is to be established in the active life, those who with fear would follow the contemplative, with greater discrimination occupying themselves. Better it is not to take a vow than to take a vow and not fulfill it. And likewise he is prohibited from such warfare who takes a wife, who plants vines and who propagates children, 2 for he is not able to serve in the Divine army who is the servant of a wife, as the Apostle says, 'He who has a wife has his care in how to please her, and he is divided in himself.' 3 And the contemplative zeal is not able to inhere in him who is yet fixed in the pleasures of the flesh. 'No one,' says the Apostle, 'is a soldier of God who is involved in worldly business, but he who is would please him who has approved him.' 4 Saint Isidore of Seville, Expositions of Sacred Mysteries or Questions on the Old Testament, On Exodus, Chap 27 1 Deut 20.8 2 Deut 20. 5-7  3 1 Cor 7.33 4 2 Tim 2.4