from Christian Schubart's Ideen zu einer Aesthetik der Tonkunst (1806)
C Major
Completely Pure. Its character is: innocence, simplicity, na�vety, children's talk.
C Minor
Declaration of love and at the same time the lament of unhappy love. All languishing, longing, sighing of the love-sick soul lies in this key.
Db Major
A leering key, degenerating into grief and rapture. It cannot laugh, but it can smile; it cannot howl, but it can at least grimace its crying.--Consequently only unusual characters and feelings can be brought out in this key.
C# Minor
Penitential lamentation, intimate conversation with God, the friend and help-meet of life; sighs of disappointed friendship and love lie in its radius.
D Major
The key of triumph, of Hallejuahs, of war-cries, of victory-rejoicing. Thus, the inviting symphonies, the marches, holiday songs and heaven-rejoicing choruses are set in this key.
D Minor
Melancholy womanliness, the spleen and humours brood.
Eb Major
The key of love, of devotion, of intimate conversation with God.
D# Minor
Feelings of the anxiety of the soul's deepest distress, of brooding despair, of blackest depresssion, of the most gloomy condition of the soul. Every fear, every hesitation of the shuddering heart, breathes out of horrible D# minor. If ghosts could speak, their speech would approximate this key.
E Major
Noisy shouts of joy, laughing pleasure and not yet complete, full delight lies in E Major.
E minor
Na�ve, womanly innocent declaration of love, lament without grumbling; sighs accompanied by few tears; this key speaks of the imminent hope of resolving in the pure happiness of C major.
F Major
Complaisance & Calm.
F Minor
Deep depression, funereal lament, groans of misery and longing for the grave.
F# Major
Triumph over difficulty, free sigh of relief utered when hurdles are surmounted; echo of a soul which has fiercely struggled and finally conquered lies