Be sure that it is a mistaken devotion which interferes with the duties of your natural state of life.

We must not measure the reality of love by feelings, but by results. Feelings are very delusive. They often depend on mere natural temperament, and the devil wrests them to our hurt. A glowing imagination is apt to seek itself rather than God. But if you are earnest in striving to serve and endure for God's sake, if you persevere amid temptation, dryness, weariness, and desolation, you may rest assured that your love is real.

He who has found his soul's life in God is happy -- not, In truth, with perfect happiness: that is not granted to men in this world, but a foretaste thereof --he has a secret joy which is beyond the reach of temptation, unrest, and sorrow; a quiet confidence and steadfastness which abide even while the waves and storms of life sweep over him... When the soul has sincerely given itself up to God, He fills it with His own peace, a peace which makes all earthly things indifferent -- as before His Presence, absorbing the heart. It is our strength, our comfort, our guide, the deeper and more confirmed it becomes, the greater our spiritual perfection; so that in truth to obtain and preserve this peace is the real secret of the interior life.

Feast of Etheldreda, Abbess of Ely, c.678 The soul which gives itself wholly and without reserve to God is filled with His own Peace; and inasmuch as we are prone to grow like that to which we are closely united, the closer we draw to our God, so much the stronger and more steadfast and more tranquil shall we become.

Feast of Commemoration of Helena, Protector of the Faith, 330 But how shall we rest in God? By giving ourselves wholly to Him. If you give yourself by halves, you cannot find full rest -- there will ever be a lurking disquiet in that half which is withheld... All peace and happiness in this world depend upon unreserved self-oblation to God. If this be hearty and entire, the result will be an unfailing, ever-increasing happiness, which nothing can disturb. There is no real happiness in this life save that which is the result of a peaceful heart.

Devotion is not a passing emotion: it is a fixed, enduring habit of mind permeating the whole life and shaping every action. It rests upon a conviction that God is the Sole Source of Holiness, and that our part is to lean upon Him and be absolutely guided and governed by Him; and it necessitates an abiding hold on Him, a perpetual habit of listening for His Voice within the heart, as of readiness to obey the dictates of that Voice.