Philosophy is the discipline that studies major and universal questions, such as existence, cognition, values, reason, and language. It encompasses many topics and problems, from ethics and political figures to metaphysics and logic. Here are principal nuances of philosophy:

1. Definition of Philosophy
Philosophy comes from the Greek words "philos" (love) and "sophia" (wisdom). It is zeal to realize and make sense of the world around us and our place in it.

2. The Main branches of philosophy
- Ontology research of the essence of being and existence.
- Epistemology the study of the nature and limits of cognition.
- Ethics the analysis of ethical principles and concepts of good and evil.
- Logic the study of the forms and principles of correct thinking.
- Socio-political philosophy the study of questions of power, justice and the state.

3. Notable Philosophers
During the history of philosophy, almost many thinkers have made meaningful contributions to this science. Some of the most famous include:
- Socrates, considered the progenitor of Western philosophy.
- Plato, a pupil of Socrates, developed the doctrine of forms.
- Aristotle, the creator of logic and a large number of scientific fields.
- Immanuel Kant, known for his own Philosophy critical philosophy and work on moral issues.

4. The Relevance of Philosophy in the Modern World
Philosophy remains relevant in the modern world because it helps people to understand difficult social and moral issues, and also develops critical thinking. It affects the legal system, politicians, and different fields of science.

5. Practical Applications of Philosophy

Philosophical ideas enter daily life. Ethical reflection helps people do the correct thing in complex situations, and philosophical analysis contributes to best understanding of problems related to technology, art, and social justice.

Philosophy is not only an academic discipline, yes and a way of thinking that helps us to understand life's complexities and make informed choices.