Humanism
Scholars of the Renaissance adopted the humanist method in study and focused on realism and emotion in art. Humanism was not a philosophy as it was seen as by many, it was more a method of learning. Unlike the medieval scholastic method, which focused on sorting contradictions between authors, humanists would study ancient texts in the original, typically written in none other than Latin, or ancient Greek, and appraise them through a combination of reasoning and evidence. A hunt, by Poggio Bracciolini, who was credited with the discovery of the complete works of fifteen different authors, turned up Vitruvius' work on art and architecture, allowing for the completion of the Duomo of Florence by Filippo Brunelleschi. Artists such as Masaccio strove to show the human form realistically, developing techniques to render perspective and light more naturally. Political philosophers, most famously Niccolo Machiavelli, tried to describe political life as it really was and to improve government on the basis of reason.
Art
Science
Science and art were very much the same in the early in early renaissance, with artists like Leonardo da Vinci making observational drawings of anatomy and nature. A new way of learning was found during this era, the use of empirical evidence, the importance of mathematics and throwing away the final cause in favour of mechanical philosophy. This method led to great and fortunate alliances in the fields of astronomy, physics, biology and anatomy.