Source identified1
“Faith, therefore, allows the greatest latitude in philosophic speculation, allowing us without blame to think what we like about anything.”
Spinoza separates faithful conduct from enforced uniformity of speculation: people can differ widely in philosophical belief while still being judged by whether their teaching leads toward justice and charity rather than hatred.
Source note: A Theologico-Political Treatise, Part III, Chapter XIV, Project Gutenberg #991. The sentence is followed by Spinoza’s distinction between opinions that foster obstinacy, hatred and strife and those that support justice and charity.