The futility of the decrees of the synod of 1542 becomes still more apparent in the light of the stand of the Polish nobility at the Diet of Cracow the following year. Open aggressiveness and sympathy with the Reformation is here in evidence. The nobility demanded of the king at this Diet and secured (1) the retention within the country for purposes of defense against foreign aggression of the annates paid to the Pope, and (2) the revocation of the unconstitutional edict of 1534, reaffirmed in 1540, forbidding Polish citizens to study, or to educate their children abroad in universities infected with heresy. In compliance with the urgent request of the senators and the deputies the king agreed to send an embassy to the Pope with a petition, which was more a notification than a request, that the annates be allowed to be retained in the country; and should the Pope refuse to agree to that, he was to be at once notified that the annates would not be allowed to be given or exported from the country any more.[103] As to the second point, the edicts forbidding Polish citizens to visit certain places abroad were abrogated, and they were again given full liberty to visit foreign countries for any purpose whatever, provided they were not accompanied by a military retinue, or went to engage in war. But, returning, they were not permitted to import heretical books, or to disseminate among the common people doctrines not accepted by the Roman Catholic Church. Whoever should be found guilty of this offense, was to be prosecuted according to the laws of the kingdom against heretics.[104] This measure reveals a recognition on the part of the king of the impossibility of restraining anyone from personally accepting the new teaching, particularly any of the nobility. The only thing it seeks to guard against is the public dissemination of the new teaching among the common people. These significant gains stimulated the adherents to the Reformation and its sympathizers to greater and more open activity. The new movement, as has already been noted, had penetrated even into the royal court, and had found followers among those nearest to the king. The environment of the Crown Prince had been strongly saturated with the new ideas, and every effort was made to win the young prince over to the new cause. Two of his preachers began openly to denounce the abuses of the church. They were John Koźmiński, known also as Cosminius, and Lawrence Prasznicki, called also Prasnicius and Discordia. The latter became very well known among the Protestants later on.[105] Their first public attacks on the church and demands for reform were naturally of a general character, and that enabled them to continue their activity at court for some time.