This textbook provides an insightful exploration of the transformative power of lifelong learning in today's digital era—an age characterized by liquid modernity. It serves as both a comprehensive instructional resource and an academic reference for researchers, offering a plethora of novel topics that span various dimensions of learning, including emotional, motivational, cognitive, metacognitive, attitudinal, social and paradigmatic facets. The issues relevant to digital literacy and technological advancements in the lifelong learning journey in liquid times are further discussed. The book also delves into the challenges and barriers individuals may face in their lifelong learning journeys and provide strategies to overcome them. The closing of each chapter encourages deep personal reflection by posing a number of thought-provoking questions and points, fostering a deeper connection to the material and individualized learning experiences. This text is a resource for undergraduate and graduate students, teachers, and researchers in various branches of education, including teacher education, educational studies, second and foreign language learning and teaching, and more.