WTF is the difference b/w 'Basic Structure' and 'Directive Principles'?

Yaar, samajh nahin aaya. Abhi tak 3 bar bare act padhke, lekin 'basic structure' aur 'directive principles' ke beech ka difference samajhna mushkil ho raha hai. Section 13(1) mein likha hai, "Parliament shall not make any law which takes away or abridges the rights referred to in this Part". Lekin 'basic structure' aur 'directive principles' dono hi 'Part III' mein hain, aur dono hi 'justiciable' hai, to phir kya faida hai? Kya 'basic structure' ko 'directive principles' se zyada priority milta hai? Kya 'court' 'basic structure' ko 'directive principles' ki jagah sunega?