To incorporate ethical principles into your investment strategy, you can consider several approaches:

1. Screening: Use screening criteria to exclude companies that do not align with your ethical values. For example, you may choose to avoid investing in companies involved in tobacco, weapons, or environmental pollution.
2. ESG Integration: Integrate environmental, social, and governance (ESG) factors into your investment analysis. This involves evaluating companies based on their performance in areas such as carbon footprint, labor practices, and board diversity.
3. Impact Investing: Allocate a portion of your portfolio to investments that aim to generate positive social or environmental impact alongside financial returns. This could include investments in renewable energy projects, affordable housing, or sustainable agriculture.
4. Engagement: Engage with companies as a responsible shareholder to advocate for positive change. This can involve voting on shareholder resolutions, dialoguing with company management, and collaborating with other investors to address ethical concerns.

By incorporating these approaches, you can build an investment strategy that reflects your ethical principles while aiming to achieve your financial goals.