Why did the spanish authorities considered Rizal as the soul of Philippine revolution?

The Spanish authorities considered Rizal as the soul of the Philippine revolution due to his influential writings that highlighted the injustices and abuses of the Spanish colonial government in the Philippines. Rizal's novels, particularly "Noli Me Tangere" and "El Filibusterismo," inspired and galvanized Filipinos to fight for independence from Spanish rule. Rizal's martyrdom further solidified his pivotal role in the nationalist movement against Spain.