The Aims and Objectives of the paper: This paper is aiming to shift sustainability in architecture from an abstract manner to a concrete one through reshaping design thinking (aims and methodologies) and practicing ethics. This could be achieved by developing a conceptual framework (Principles, strategies and methods) covering the entire life-cycle of architecture (cradle-to-grave).The Context and Background Literature: This part offers general review of concepts and principles of sustainable development, covering various definitions: some general and some more precise (related to architecture nature) dealing with context compatibility and long-life viability of the built-environment. This review reveals the followings: The subject of sustainability in the built environment is a complex one and can be viewed from several points of view. Designing, producing and maintaining built-environment consume a large amounts of resources (about 30% of raw materials and 42% of energy in US). As the income level of a society increases, so does its resources consumption including architectural resources (land, building products, energy, etc…). This in turn increases the combined impact of architecture on the global ecosystems. Human and societal aspects is one of the most important principles of sustainable architecture especially nowadays as - in modern society - more than 70% of a person's lifespan is spent indoors. The aim of sustainable architecture is to achieve a balanced coexistence of the three constituent groups of environment (inorganic elements, living organisms and humans).The Method of Inquiry or Argument: Theoretical analytical methodology is employed and a content analysis is used addressing the idea of sustainability as a change paradigm in architecture covering not only the environmental discipline but also the social and economical ones.The Findings and Conclusions: Integrating sustainable concept in design thinking in many levels ranging from ideological level (believes in sustainability as an ethical reasoning for architecture) to the methodological level which incorporates principles and strategies for various range of disciplines and finally the practicing level which involves methods. This hierarchical multi-layer approach can help to draw a holistic framework for introducing sustainability related syllabuses to the architectural education. Sustainability has many approaches so it is necessary to introduce the Value Engineering in the undergraduate education and in addition to, train design studio student on how to utilize this managerial methodology to organize his design thinking. Sustainability as a continues cyclic concept, requires feedback action which encourages introducing Post Occupancy Evaluation to the architectural profession in a rigorous scientific bases this can not be achieved without an early plantation of POE - as a concept and methodology - in the architectural education. Many POE assignments can help students to practice an early real fruitful architectural criticism which may convince them in the vital role of sustainability in whole life in general and architecture in particular, more than that, these POE assignments can show them practically how to make compromises between many factors in many disciplines to reach to the optimum sustainable design (in both levels of construction and building in-us.