The pasuk here is intimating the purpose of the upcoming instruction, so that we first understand that more important than the gold and silver is the dedication of our hearts to Hashem. Thereby wholeheartedly giving away their valuable possessions, the Yidden proclaimed, in essence, that they realized that the sole purpose of having these riches and resources is to serve Hashem.
We find ourselves within the stage of “Someich Geulah l’Geulah.” We have gone from the Yom Tov of Purim – the Yom Tov of giving freely to one another, exchanging gifts and distributing funds to the poor and to “kol haposhet yad nosnim lo.” Now, as we are about to announce the arrival of Chodesh Nissan – the month of Pesach, the month of “kol dichfin yeitzei v’yeichal, kol ditzrich yeitzei v’yifsach” – by doing so we are in fact proclaiming our readiness for the Geulah Shelaimah.