The document discusses establishing a "security first" culture in application development. It emphasizes that security cannot be an afterthought and must be integrated into the entire software development lifecycle (SDLC). Developers need training on writing secure code, and security issues should rank higher than any other priority. When using third-party applications, companies need to understand the architecture and risks, assume vulnerabilities exist, and implement appropriate firewalls, DMZs, and security audits. Establishing a security culture requires tools, trained in-house staff, security testing in the SDLC, and mechanisms for quickly addressing security issues that arise.