One definition of impatience is the tendency to be impatient; irritability or restlessness.
This is a sin. Impatience stems from pride. Anger is also connected to pride. Meekness comes with humility.
I have a friend who is a doctor in another state. He is the most humble man I know. He is never impatience. His humility allows him to be patient with many people.
One thinks that the business one is doing is more important than other people's business.
I have written on the predominant fault here several times. Follow the tags.
Here is the great Garrigou-Lagrange on this topic, and some of this is a repeat.
DEFINITION OF THE PREDOMINANT FAULT
The predominant fault is the defect in us that tends to prevail over the others, and thereby over our manner of feeling, judging, sympathizing, willing, and acting. It is a defect that has in each of us an intimate relation to our individual temperament.(1) There are temperaments inclined to effeminacy, indolence, sloth, gluttony, and sensuality. Others are inclined especially to anger and pride. We do not all climb the same slope toward the summit of perfection: those who are effeminate by temperament must by prayer, grace, and virtue become strong; and those who are naturally strong, to the point of easily becoming severe, must, by working at themselves and by grace, become gentle.
Before this progressive transformation of our temperament, the predominant defect in the soul often makes itself felt. It is our domestic enemy, dwelling in our interior; for, if it develops, it may succeed in completely ruining the work of grace or the interior life. At times it is like a crack in a wall that seems to be solid but is not so; like a crevice, imperceptible at times but deep, in the beautiful facade of a building, which a vigorous jolt may shake to the foundations. For example, an antipathy, an instinctive aversion to someone, may, if it is not watched over and corrected by right reason, the spirit of faith, and charity, produce disasters in the soul and lead it to grave injustice. By yielding to such an antipathy, it does itself far more harm than it does its neighbor, for it is much more harmful to commit injustice than to be the object of it.
The predominant fault is so much the more dangerous as it often compromises our principal good point, which is a happy inclination of our nature that ought to develop and to be increased by grace. For example, a man is naturally inclined to gentleness; but if by reason of his predominant fault, which may be effeminacy, his gentleness degenerates into weakness, into excessive indulgence, he may even reach the complete loss of energy. Another, on the contrary, is naturally inclined to fortitude, but if he gives free rein to his irascible temperament, fortitude in him degenerates into unreasonable violence, the cause of every type of disorder.
In every man there is a mixture of good and bad inclinations; there is a predominant fault and also a natural quality. If we are in the state of grace, we have a special attraction of grace, which generally perfects first of all what is best in our nature, and then radiates over that which is less good. Some are thus more inclined toward contemplation, others toward action. Particular care must be taken that the predominant fault does not snuff out our principal natural quality or our special attraction of grace. Otherwise our soul would resemble a field of wheat invaded by tares or cockle, of which the Gospel speaks. And we have an adversary, the devil, who seeks to foster the growth of our predominant fault that he may place us in conflict with those who work with us in the Lord's field. Christ Himself tells us: "The kingdom of heaven is likened to a man that sowed good seed in his field. But while men were asleep, his enemy came and oversowed cockle among the wheat and went his way." (2)
Christ explains that the enemy is the devil,(3) who seeks to destroy the work of God by creating disunion among those who, in a holy manner, ought to collaborate in the same work for eternity. He is skillful in exaggerating in our eyes the defects of our neighbor, in transforming a grain of sand into a mountain, in setting up, as it were, a magnifying glass in our imagination, that we may become irritated at our brethren instead of working with them. Considering all this, we can see what evil may spring up in each of us from our principal fault if we are not most attentive to it. At times it is like a devouring worm in a beautiful fruit.
Learning to diffuse impatience is a gift as well. Diffusing impatience means being patient and waiting. Waiting demands that one realizes that all people have things to do which as just as important as what one has to do.
Patience reveals a meek and humble heart. Think of the patience of Christ on the Cross. What right do we have to demand that others do our biding in our time lines?
To be continued....