Charles IX.) was Gustavus Adolphus, whom, as the son of a usurper, the
adherents of Sigismund refused to recognize. But if the obligations
between monarchy and subjects are reciprocal, and states are not to be
transmitted, like a lifeless heirloom, from hand to hand, a nation
acting with unanimity must have the power of renouncing their allegiance
to a sovereign who has violated his obligations to them, and of filling
his place by a worthier object.

Gustavus Adolphus had not completed his seventeenth year, when the
Swedish throne became vacant by the death of his father. But the early
maturity of his genius enabled the Estates to abridge in his favour the
legal period of minority. With a glorious conquest over himself he
commenced a reign which was to have victory for its constant attendant,
a career which was to begin and end in success. The young Countess of
Brahe, the daughter of a subject, had gained his early affections, and
he had resolved to share with her the Swedish throne. But, constrained
by time and circumstances, he made his attachment yield to the higher
duties of a king, and heroism again took exclusive possession of a heart
which was not destined by nature to confine itself within the limits of
quiet domestic happiness.

Christian IV. of Denmark, who had ascended the throne before the birth
of Gustavus, in an inroad upon Sweden, had gained some considerable
advantages over the father of that hero. Gustavus Adolphus hastened to
put an end to this destructive war, and by prudent sacrifices obtained a
peace, in order to turn his arms against the Czar of Muscovy. The
questionable fame of a conqueror never tempted him to spend the blood of
his subjects in unjust wars; but he never shrunk from a just one. His
arms were successful against Russia, and Sweden was augmented by several
important provinces on the east.