This paper explores the fundamental principles of Strength of Materials as presented in the authoritative text by Dr. D.S. Bedi. The paper reviews the progression of concepts from simple stress and strain to complex loading scenarios involving beams, shafts, and columns. Emphasis is placed on the relationship between external loads and the resulting internal deformations, highlighting the pedagogical approach of using Free Body Diagrams (FBD) and sign conventions essential for engineering analysis.