St Irenaeus

Why did the serpent not attack the man, rather than the woman?  You say he went after her because she was the weaker of the two.  On the contrary, In the transgression of the commandment, she showed herself to be stronger...For she alone stood up to the serpent.  She ate from the tree, but with resistance and dissent after being dealt with perfidiously.  But Adam partook of the fruit given by the woman, without even beginning to make a fight, without a word of contradiction--a perfect demonstration of consummate weakness and a cowardly soul.  The woman, moreover, can be excused; she wrestled a demon and was thrown.  But Adam will not be able to find an excuse...he had personally received the commandment from God.

(source: A Father Who Keeps His Promises, by Scott Hahn, Servant Books, 1998)

St. Augustine of Hippo

Breathe into me Holy Spirit, that my thoughts may all be holy.  Move in me Holy Spirit, that my work, too may be holy.  Attract my heart Holy Spirit, that I may love only what is holy.  Strengthen me Holy Spirit, that I may defend all that is holy.  Protect me, Holy Spirit, that I may always be holy. Amen.

St. Ignatius of Antioch

Therefore it is fitting that you agree with the opinion of the bishop as you are doing. Your rightly famous presbytery is worthy of God.  It is in harmony with the bishop like strings tuned to a harp.  For this reason, Jesus Christ is praised in your harmony and in your united love.

Pope John Paul II

Even when not motivated by a selfish refusal to be burdened with the life of someone who is suffering, euthanasia must be called a false mercy, and indeed a disturbing "perversion" of mercy. True "compassion" leads to sharing another's pain; it does not kill the person whose suffering we cannot bear.  Moreover, the act of euthanasia appears all the more perverse if it is carried out by those, like relatives, who are supposed to treat a family member with patience and love, or by those, such as doctors, who by virtue of their specific profession are supposed to care for the sick person in the most painful terminal stages.

St. Francis deSales

God has supreme hatred for sin, and yet He most wisely permits it.  This is to allow rational creatures to act according to their natural condition; it is also to render the good more worthy of commendation when they do not violate the law, even though they are able ti violate it.  Let us therefore adore and bless this holy permission.

Pope Pius XI

But no reason, however grave, may be put forward by which anything intrinsically against nature may become conformable to nature and morally good.  Since, therefore, the conjugal act is destined primarily for the begetting of children, those who in exercising it deliberately frustrate its natural power and purpose, sin against nature and commit a deed which is shameful and intrinsically vicious.

St. Thomas Aquinas

In the world of sense we find there is an order of efficient causes. There is no case known (neither is it, indeed, possible) in which a thing is found to be the efficient cause of itself; for so it would be prior to itself, which is impossible. Now in efficient causes it is not possible to go on to infinity,because in all efficient causes following in order, the first is the cause of the intermediate cause, and the intermediate is the cause of the ultimate cause, whether the intermediate cause be several, or only one. Now to take away the cause is to take away the effect. Therefore, if there be no first cause among efficient causes, there will be no ultimate, nor any intermediate cause. But if in efficient causes it is possible to go on to infinity, there will be no first efficient cause, neither will there be an ultimate effect, nor any intermediate efficient causes; all of which is plainly false. Therefore it is necessary to admit a first efficient cause, to which everyone gives the name of God.